Heat Shrink Sleeves (HSS) for Liquid Drain Hold-Up Vessels
Complete External Coverage Solution for Vessel Corrosion Protection
Product Overview
Our Heat Shrink Sleeves (HSS) are engineered to provide complete external coverage of Liquid Drain Hold-Up (LDH) vessels, delivering a continuous, seamless corrosion protection barrier across the entire vessel surface. Unlike pipeline field-joint applications where sleeves cover only the weld joint, this solution is designed for full-surface encapsulation of the vessel, including the shell, heads, nozzles, and support structures.
Each HSS system is custom-fabricated to match the specific vessel dimensions and intended service conditions as defined in the project drawing, ensuring a precise fit and reliable long-term protection.
Product Specifications
| Parameter |
Specification |
| Product Type |
Heat shrink sleeves (HSS) for vessel external coverage |
| Application |
Complete external corrosion protection of LDH vessels |
| Customization |
Fabricated to vessel dimensions and service conditions per project drawing |
| System Construction |
Cross-linked polyolefin backing + high-performance hot-melt adhesive |
| Coverage |
Full external surface: shell, heads, nozzles, and supports |
| Service |
Buried, above-ground, or sheltered vessel installations |
Key Features & Benefits
| Feature |
Benefit |
| Complete External Coverage |
One continuous protective barrier across the entire vessel surface—no gaps, seams, or unprotected areas |
| Custom-Fabricated to Drawing |
Each sleeve is sized and shaped to match the specific LDH vessel dimensions and nozzle layout |
| Seamless Corrosion Barrier |
Eliminates moisture ingress paths at seams and overlaps; protects against external corrosion |
| Cross-Linked Polyolefin Backing |
Excellent mechanical strength, UV resistance, and long-term durability |
| High-Performance Hot-Melt Adhesive |
Bonds firmly to prepared steel and maintains adhesion under thermal cycling and service loads |
| Heat-Shrink Conformability |
Conforms tightly to curved surfaces, heads, and nozzle transitions without bridging or voids |
| Suitable for Intended Service Conditions |
Formulated and rated to meet the temperature, pressure, and environmental conditions specified in the vessel drawing |
System Construction
| Layer |
Component |
Function |
| First Layer |
Two-component epoxy primer (where specified) |
Bonds to steel; provides cathodic disbondment resistance |
| Second Layer |
High-performance hot-melt adhesive |
Bonds to primer and steel; seals the vessel surface |
| Third Layer |
Radiation cross-linked polyolefin backing |
Mechanical protection, moisture barrier, UV resistance |
The system is applied in sections over the prepared vessel surface, with overlaps designed to create a continuous, monolithic protective layer.
Customization for LDH Vessels
Each HSS system is engineered to the specific requirements of the LDH vessel:
| Customization Parameter |
Details |
| Vessel Dimensions |
Shell diameter, length, head geometry, and nozzle positions per drawing |
| Sleeve Configuration |
Pre-cut sections or wraps sized to cover specific vessel zones |
| Temperature Rating |
Selected based on vessel design temperature and service conditions |
| Adhesive Grade |
Matched to substrate and operating environment |
| Overlap Design |
Engineered for continuous coverage across section boundaries |
| Nozzle and Support Coverage |
Custom pieces for nozzles, manways, saddles, and support attachments |
Typical Properties (Reference)
| Property |
Typical Value |
| Backing Material |
Radiation cross-linked polyolefin (PE or PP) |
| Adhesive Type |
High-performance hot-melt adhesive |
| Backing Thickness |
0.8 – 1.5 mm (product-dependent) |
| Total Thickness |
2.0 – 3.0 mm (product-dependent) |
| Service Temperature |
Selected per vessel design conditions |
| Peel Strength |
Per project specification |
| Cathodic Disbondment |
Per project specification |
| UV Resistance |
Yes (cross-linked polyolefin backing) |
Values are indicative and shall be confirmed against the specific vessel drawing and project specification.
Compliance
Heat-shrinkable materials for corrosion protection are manufactured and tested in accordance with applicable international standards, including ISO 21809-3 (field joint coatings) where relevant, and project-specific vessel coating specifications. Compliance documentation, including material certificates, test reports, and traceability records, is provided with each supply.
Primary Applications
-
Liquid Drain Hold-Up (LDH) vessels – Complete external corrosion protection
-
Process vessels and separators – External coating where continuous coverage is required
-
Storage and surge vessels – Protection against external corrosion and environmental exposure
-
Custom-fabricated equipment – Any vessel requiring full-surface heat-shrinkable coverage
Supply Scope
| Item |
Details |
| Heat Shrink Sleeves |
Custom-fabricated sections for complete vessel coverage per drawing |
| Epoxy Primer (where specified) |
Two-component liquid epoxy supplied as A+B kit |
| Closure and Overlap Materials |
Patches and strips for sealing section overlaps |
| Installation Accessories |
Heating tools, rollers, and application equipment as required |
| Documentation |
TDS, MSDS, installation procedure, compliance certificates, and traceability records |
Installation Summary
Surface Preparation: Abrasive blast clean the vessel surface to the specified cleanliness grade (typically Sa 2½ per ISO 8501-1).
Preheat: Preheat the steel surface to the manufacturer’s recommended temperature.
Apply Primer (where specified): Apply two-component epoxy primer to the prepared surface.
Position Sleeve Sections: Wrap the pre-cut HSS sections around the vessel, starting from the shell and working toward heads and nozzles.
Shrink and Seal: Apply heat uniformly to shrink the backing and flow the adhesive; press overlaps to ensure continuous sealing.
Inspect: Verify complete coverage, absence of voids or bridging, and proper adhesion at all overlaps and transitions.
Why Choose CNPetro for LDH Vessel HSS?
-
Custom Engineering – Each system fabricated to the specific vessel drawing and service conditions
-
Complete Coverage – One continuous barrier across the entire vessel external surface
-
Proven Heat-Shrink Technology – Reliable performance in demanding corrosion environments
-
Full Documentation – TDS, MSDS, compliance certificates, and traceability records provided
-
Technical Support – Application guidance and on-site support available
CNPetro — Protecting pipelines. Advancing performance.
For vessel-specific HSS engineering, drawings review, or technical consultation, please contact our sales team.
Keywords: heat shrink sleeves, LDH vessel, Liquid Drain Hold-Up, complete external coverage, vessel corrosion protection, custom-fabricated HSS, heat-shrinkable coating, vessel encapsulation
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